Perhaps you should try some spelling variations:
thuat canh » thuat lanh, thuat cong, thuat chan
thuat san » thuat toan, thuat song, thuat lanh
van gian » van giang, dan gian, van giao
gian dan » gian lang
dan hoa » danh hoa, dan hoat, dan khoa
hoi van » hoi va, hoi dan, hai van
mo hoc » mon hoc, co hoc
hoc xa » hoc ma

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat canh) OR (thuat san)) hoc tap, nghien cuu mo hoc dan hoa hoc xa hoi van gian dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat canh) OR (thuat san)) hoc tap, nghien cuu mo hoc dan hoa hoc xa hoi van gian dan".
• Adding a wildcard symbol may retrieve word variants: ((thuat canh) OR (thuat san)) hoc tap, nghien cuu mo hoc dan hoa hoc xa hoi van gian dan*.